1. 1) F. Garofalo: Fundamentals of Creep and Creep Rupture in Metals, Macmillian, (1966), p. 146.
2. 2) K. T. Aust and J. W. Rutter: Recovery and Recrystallization of Metals, Ed. by L. Himmel, John and Wiley Sons, (1963), p. 132.
3. 3) P. H. Thornton and R. W. Cahn: J. Inst. Metals, 89 (1961), 455.
4. 4) G. E. Rhead and H. Mykura: Acta Met., 10 (1962), 843.
5. 5) B. Chalmers et al.: Prog. Roy. Soc., A 193 (1948), 465.